Foxes have a sense of humour!
Dug up and replaced a 20m wooden fence that was falling down with a proper Cant-Railed job. Met a fox face to face a couple of times while doing it and it was pretty good at standing its ground. Obviously used our garden as a route and a pooping spot (and Mrs Fox used to play with her cubs occasionally).
The very next morning after I'd finished closed--bordering the frame and blocking that route into the garden, I found a neat big dollop of tar-like evacuation in my back door-step!